Section 96:

1 In any proceeding, whether civil or criminal, an instrument to the validity of which attestation is required by law may, instead of being proved by an attesting witness, be proved in the matter in which it might be proved if no attesting witness were alive.
Provided that nothing in this section shall apply to the proof of wills or other testamentary documents.

2 If no attesting witness is alive, an instrument to the validity of which attestation is required by law is proved by showing that the attestation of one attesting witness at least is in his handwriting, and that the signature of the person executing the documents is in the handwriting of that person.